Ch. 13, 15 gas & solution test [85 points] Chemistry

Show your work in an organized manner, includes any relevant equation / formula, proper units in your work / answer, and the proper number of significant figures in your answer.

1. solve for the unknown temperature [10 points]

 

Initial

Final

Temperature

25 °C

?

Volume

11.2 L

22.4 L

Other variables

?

unchanged

 

2. A 5.0 L container at 325 K contains 10.0 g H 2, 20.0 g Ne, and 30.0 g Cl 2. [20 points]

a. what is the partial pressure of neon in the container ?

b. what is the total pressure in the container ?

 

3. C 2H 6 (g) + O 2 (g)  -->  CO 2 (g) + H 2O (g)

5.0 L          10.0 L

The reactants are at 475 K and the partial pressure of each gas was 5.0 atm. What is the volume of CO 2 produced at STP ? [20 points]

 

4. What is the molarity of an aqueous solution containing 5.0 % glucose ? [glucose = C 6H 12O 6; assume that the density of the solution is 1.05 g / mL]? [10 points]


5.   H 2SO 4 (aq) + NaOH (aq) -->  Na 2SO 4 (aq) + H 2O (l)

 

In an acid – base titration experiment, 15.0 mL of a 1.0 M H 2SO 4 solution was needed to titrate 50.0 mL NaOH solution. Determine the [NaOH]. [10 points]

 

6. Na 2CO 3 (aq) + FeCl 3 (aq)  --> ____ grams of a precipitate. [15 points]

10.0 mL                  5.0 mL

20.0 mM                   30.0 mM